If the entered data is not true, the information cannot be true. To enter the data properly and easily during the development of an information system, an analyst con siders input design one of the most important tasks.
Input design is a process in which the user-oriented descriptions of the input, under program-oriented specifications, are turned into computer based business system.
Wrongly input data is the most common cause of errors in data processing.
The weak input design specially where the operators enter data from source input, invite wrong data to the system.
General form design considerations only collects the desired data and put the similar or related data into groups.
Visual display terminal is one of today's most important methods. Effective screen design not only reduces the number of errors related to entering the data but also increases production and the satisfication level of the user.
There are many on-line data entry stations (VDTs) which provide pictorial check of the input data and the source which make the user prompt. When the data are entered, they are echoed or displayed on the screen.
MICR or Magnetic Ink Character Recognition is a technique mostly used in banking where in large number, cheques are checked. In the figure 10.1, 14 character fonts approved by the banks have been shown and in figure 10.2 has been shown a cheque which has been examined by MICR technique.
In MICR technique, characters are printed on cheque by a special magnetic ink. The MICR reader reads the characters printed on the cheque by the sensitivity of the the characters by the optical
Optical bar-code reader identifies the combinations of the symbols which are to be coded. This system, known as Universal Product Code (UPC) applies on retail pack ages and is generally complicated to be designed.
Optical Character Readers have been designed for those applications which specially by the use of light can use the readable symbols.
Output design, since the beginning of the project, has been a continuous action.
The principles used in designing VDT screen output are similar to the principles used in the designing of form and computer printer output.
The biggest negative aspect of dot-matrix is that the quality of its print is lower than fixed character printer.
Desktop publishing is a word which is used for the combination of a desktop or personal computer and a laser printer.
Most forms have five basic parts. These parts are title, instructions, heading, body and conclusion.
The cost of collecting the improved data and processed information are two principal costs of a system.
One of the benefits of those personal computers with enormous capacity which are powerful today too, and of refined page layout is the automation of form design. Page layout program is designed for the typist quality output to work with laser printer.
A form designed for effective use is an important step in the direction of controlling the cost of data collection.
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